Process of burning lime



' llNITED STATES PATENT OFFICE.

FRED B. LIVINGSTON, OF CAMBRIDGE, NEW YORK.

PROCESS OF BURNING LIME.

SPECIFICATION forming part of Letters Patent No. 241,034, dated May3,1881. Application filed October 7, 1880. (Specimen-S.)

To all whom it may concern: ing. Neither doesit prevent the subsequentBe it known that I, FRED BAssE'r'r LIV- slaking of the lime in water.While it pre- INGSTON, of the town of Cambridge, county of vents thebreaking up of the lime when being Washington, and State of New York,have intransported, it also prevents to a large extent 4o 5 vented a newand usefulImprovementinProthe deterioration produced by becoming;aircesses for Burning Lime, of which the followslaked. When lime thusproduced is slaked ing is a specification. in water the silicate becomesa solvent men- My invention relates to a process for burnstream forfurther cementing the material with ing lime from that native form ofcarbonate of which it is usually associated for making ma- 1o lime knownas marble, and the object of my sons putty or mortar.

inventionis toproducea-goodqualityofcaustic While my invention is moreparticularly inlime from such marble as is quarried near the tended toapply to thatform ofcarbonate known surface, and which is too soft forthe ordinary as marble, it may also be applied with the uses to whichmarble is applied, as well as to same beneficial results in the burningof such 0 I 15 utilize for this purpose the marble chips and other kindsof the native carbonate of lime as a 1 fragments which are produced inquarrying crumble in the same mannerin thekiln under r and workingmarble. the influence of heat. a, It is well known that when thiscrystallized I Having thus described my invention, what form ofcarbonate of lime is burned in the ordi- I claim, and desire to secureby Letters Pat- :5

2o nary manner it deflagrates and crumbles uncut, is

der the action of the heat, and the resulting The process hereindescribed for burning powder, though highly caustic, soon deteriolimefrom acrystalline carbonateof lime which rates. To remedy this conditionI add to the crumbles in the kiln when being heated, and marble atintervals, while being fed into the consisting of the addition, insufticient quan- 6o 5 kiln, silicious sand, which is thrown in amongtity, of silicious sand to coat the exterior surthe broken marble beingburned. As the marface of the fragments with a silicate of lime, bledescends in the kiln the added sand works which is formed by the sandand lime under down through the interstices of the mass, and theinfluence of the heat in the kiln while the when reaching the bottom,where the heat is lime is being burned. 6 0 most intense, it fuses withthe lime to form a Signed at Cambridge, New York, this 11th silicate ofthe latter, which coats over the eX- day of September, A. D. 1880.terior surface of the fragments being burned,

and so as to prevent their breaking up and FRED BASSEDT LIVINGSFON'crumbling. This coating of the silicate does Witnesses:

; 5 not interfere with the elimination of the car- GEO. H. BAKER,bonic-acid gas during the operation of burn- CLARK RICE.

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